Power-transmission device.



No. 807,627 PATENTED DEC. 19, 1905. G. W. MARBLE. POWER TRANSMISSIONDEVICE.

APPLICATION FILED DEC. 7, 1904.

No. 807,627. PATENTED DEC. 19, 1905. G. W. MARBLE. I POWER TRANSMISSIONDEVICE.

APPLICATION FILED DEG. 7, 1904.

2 SHEBTS-SHIBET 2.,

76%7663255 @CBG GEORGE W. MARBLE, OF CHICAGO, ILLINOIS.

POWER-TRANSMISSION DEVICE.

Specification of Letters Patent.

Patented Dec. 19, 1905.

Application filed December 7, 1904.. Serial No. 235,867-

To aZZ whom it may concern.-

Be it known that I, GEORG W. MARBLE, a citizen of the United States, anda resident of the city of Chicago, in the county of Cook and State ofIllinois, have invented certain new and useful Improvements inPower-Transmission Devices; and I do hereby declare that the followingis a full, clear, and exact description of the same, reference being hadto the accompanying drawings, and to the letters of reference markedthereon, which form a part of this specification.

This invention relates more particularly to a reversible andvariable-speed power-transmission device for constant-speed motors, andfor convenience of illustration is shown embodiedin an inspection-car,though obviously it may be used to drive any other vehicle or for anyother purpose for which it is adaptable. I

Heretofore many different frictional transmission-gears have beendevised more or less adaptable for use with constant-speed motors. Hostof these, however, have been more or less objectionable, owing to themultiplicity of parts and also for the reason that if reversible at allthe mechanism has been complicated and frequently incapable ofadjustment to secure transmission without slippage, thereby not onlyoecasioningaconsiderablelost motion and power in performing its work,but also requiring a great deal of care and skill to keep in repair.Furthermore, it has not heretofore been thought advantageous in suchdevices to carry the driving friction members directly upon themotor-shaft and to provide for the reversal of motion without reversingthe motor.

It is a further object of this invention to provide means whereby thefriction members may be quickly adjusted with respect to each other togive any desired degree of frictional engagement, to drive, operate as abrake, to reverse the drive, or vary the speed.

The invention consists in the matters hereinafter described, and morefully pointed out and defined in the appended claims.

In the drawings, Figure 1 is a top plan view, broken away, of aninspection-car and transmission embodying my invention. Fig. 2 is afragmentary section taken on line 2 2 of Fig. 1. Fig. Sis a sectiontaken on line 3 3 of Fig. 1. Fig. t is a fragmentary section similar toFig. 2, with parts removed, showing the manner of securing the drivenfriction members upon the shaft.

As shown in said drawings, the construction,

as shown, is embodied as a part of the driving mechanism for aninspection-car, in which A and A are the axles, of which A is driven bypower transmitted from the motor B, which, though shown as aninternal-combustion engine, may be any motor and may operatecontinuously independent of the movements and stops of the car. Themotor may be supported and secured in any preferred manner to thecar-frame. As shown, said car-frame is provided with a transverse beamor sill A rigidly engaged to and beneath the side sills A A and securedthereon, and on the adjacent end sill A on each side the longitudinalcenter, are longitudinal beams B B, which in the particular frame shownmore clearly in Figs. 1 and 3 are offset downwardly at their ends topass below the axle A and are provided with bearings b of any desiredkind, in which said axle is journaled.

Slidably but non-rotatively engaged upon the axle A by means, as shown,of a spline b are friction-disks C and G, which are integrally connectedby means of the sleeve cand the inner faces of which are in parallelplanes. At the outer side of each friction-disk and adapted to bearagainst the hub of the same is a ball or other antifriction bearing ofany preferred type, but, as shown, each comprising an annularball-retainer D, carrying a plurality of balls OZ, which engage on theside adjacent the friction-disk on a bearing-plate d, which is rotativewith the disks, and on the opposite side said balls engage abearingplate (Z rigidly engaged upon a non-rotative collar D. gaged uponthe axle A, and pivotally engaged thereon are the forked levers D D,which extend rearwardly and are pivoted centrally upon theupwardly-directed studs Z2 5 carried on the braces 6 6 which are rigidlyengaged at one end upon the longitudinal sills or beams B B and arecurved laterally and rigidly engaged at the opposite ends upontransverse beam or sill A The rear ends of said levers D and D arerigidly connected by means of the adjusting-rod D*, which, as shown, isprovided with a turnbuckle cl, adapted to vary thedistance between saidlever ends, thereby varying the frictional engagement of the collars Dupon the respective ball-bearings and necessitating simultaneousmovement of both levers.

Rigidly supported on the cross-sill A is a central bearing-box E, inwhich is journaled the motor-shaftB approximately at a level Saidcollars D are slidably enwith the axle A. Splined on said shaft betweensaid box and the axle A is the driving friction-wheel F, of paper of anydesired material or construction. Means are provided for shifting saiddriving friction-wheel longitudinally of the shaft B to vary speed,comprising, as shown, the standard E, integral with the cap of the box Eand in which is journaled a forwardly-directed screw-shaft F, parallelwith the shaft B and which is held from longitudinal movement therein bymeans of the beveled pinion f and by a collar f, rigidly engaged on saidshaft on opposite sides the standard. An internally-threaded sleeve F iscarried on said shaft, on each end of which is a downwardlyextending armforming a yoke f engaging said driving friction-wheel F at each end, sothat when said shaft F is rotated said friction-wheel is moved radiallyof the friction-disks, the direction depending on the direction ofrotation of the shaft F. As shown, an upwardly-extending shaft F isjournaled at its lower end in said standard E and is provided with abeveled gear f adapted to mesh with said 'beveled pinion fto drive theshaft F. For the purpose of moving the friction-disks C and G into orout of engagement with the frictionwheel F a screw-shaft G is journaledat its inner end in a suitable bearing in said standard E and centrallythereof in a standard G, rigidly secured upon the cross-sill A Saidshaft G, as shown, is provided with a beveled gear g, the hub of whichengages against the standard G and prevents longitudinal movement of theshaft. An internally-threaded nut g, complemental with said screw-shaftG, is pivoted in the lever D as shown in Fig. 1 and in dotted lines inFig.3. Rotation of said shaft thus moves said lever laterally, carryingwith it the lever D and causing corresponding movement of the collars Dand shifting the disks C and C longitudinally of the shaft A. Meshingwith the gear g is a bev-v eled gear H, which, as shown, is positionedabove and concentric with the gear f and is provided with a tubularshaft inclosing the shaft F for the speed-shaft and which, as well assaid shaft F maybe provided with ahandwheel or any preferred means forrotating the one independently of the other.

The operation is as follows: The driving friction-Wheel F being engagedupon the motor-shaft B is always driven in the same direction and at themotor speed. By means of the friction-disks C and 0, carried upon theaxle A, the axle or shaft A can be driven in either direction, dependentupon which disk is in engagement with the driving frictionwheel. Bymeans of the shaft H, which actuates the screw-shaft G, the pivotedlevers D and D are simultaneously shifted in either direction, therebycarrying either of said friction-disks into or out of driving contactwith the driving friction-wheel F. The antifriction-bearings at the hubsof said disks enable a firm gripping engagement to be had at all timeswith said disks, the degree of which may be varied by means of theconnectingrod Di When it is desired to vary the speed, the screw-shaft Fis operated by the shaft F shifting the driving friction-wheel radiallyof the disks.

While I have shown my device as embodied in an inspection-car, I do notpurpose limiting this application otherwise than necessitated by theprior art, as obviously the invention may be used with vehicles of manykinds and for many other purposes and many details of construction maybe varied without departing from the principles of my invention.

1 claim as my invention 1. The combination with a friction-wheel of afriction-disk on each side thereof, means for adjusting saidfriction-wheel radially of said disks, adjustably-connected leversengaging the outer sides of said disks and means engaging the sameacting to move said disks simultaneously one into and the other out ofengagement with said friction-wheel.

2. In a device of the class described the combination with a shaft oraxle of a pair of friction-disks slidably engaged thereon, a rotativeshaft intermediate said 'disks, a driving friction-wheel slidablyengaged thereon, means adapted to adjust said driving friction-wheellongitudinally of its shaft, means holding said disks in unvaryingrelation and a pair of adjustably-connected levers acting to shift saiddisks simultaneously, the one into and the other out of engagement withthe driving friction-wheel.

3. 1n avehicle the combination with an axle, amotor-shaft, afriction-wheel actuated thereby, a pair of inwardly-facingfriction-disks slidably engaged on the axle either adapted to engagesaid driving friction-wheel, adjust- .ably-connected levers adapted toshift said disks simultaneously and rotative means acting to adjust saiddriving friction-wheel radially of the disks.

4. The combination with a vehicle-frame and one of its axles, of a pairof unvaryinglydistanced friction disks slidably engaged thereon androtative therewith, a pair of adjustably-connected levers forsimultaneously shifting said disks longitudinally of the axle, adriving-shaft carried on said frame and extending between said disks, afriction-wheel slidable thereon adapted to be engaged by either disk anda screw-shaft engaging one of said levers for adjusting either of saiddisks into engagement with said friction-wheel.

5. The combination with a shaft or axle, of a pair of permanently-spacedfriction-disks slidably engaged thereon, a driving-shaft extendingbetween the same, a friction-wheel slidable thereon, a yoke adapted totravel longitudinally of the driving-shaft and shiftthe friction-wheelradially of the disks and adjustably-connected levers acting to shiftthe disks relatively to the driving friction-wheel.

6. Inadevice of the class described the combination with avehicle-frame, of a motorshaft thereon, a longitudinally-movable drivingfriction-wheel on said shaft, an axle journaled in said frame, afriction-disk on said axle at each side the driving friction-wheel, alever pivoted at the. outer side of each disk, antifriction bearingsconnected therewith adapted to engage said disks, means for varying thecontact of said bearings and means acting to shift said disks relativelythe driving friction-wheel.

7. In a device of the class described the combination with an axle of apair of inwardlyfacing friction-disks slidably engaged thereon,antifriction-bearings at the outer sides of said disks, adjustable meansadapted to grip said bearings and disks between the same and to movesaid disks longitudinally of the axle, a positively-drivenfriction-wheel intermediate said disks adapted to be engaged by eitherto rotate said axle and rotative means for shifting said disks.

8. In adevice of the class described the combination with avehicle-frame of an axle journaled therein, a pair of rigidly -connectedfriction-disks slidably engaged thereon and antifriction-bearingsat theouter sides of said disks, adjustable means adapted to hold saidbearings into positive engagement with said disks, a screw-shaft engagedtherewith adapted to shift the disks longitudinally of the axle, amotor-shaft, a driving friction-roller driven thereby and radiallyadjustable between the disks and adapted to drive either.

9. In a device of the class described the combination with avehicle-frame, and one of its axles of longitudinally-movable connectedfriction-disks on said axle, adriving-shaft extending between saiddisks, adrivingfrictionwheel slidable on said shaft, a yoke adapted tomove said friction-wheel longitudinally of the shaft, a screw-shaftengaged in said yoke, means for rotating the same and adjustable meansadapted to move either of said disks into or out of contact With saiddriving friction-wheel.

10. In a device of the class described the combination with avehicle-axle, of a pair of connected friction-disks slidably engaged onsaid axle and rotative therewith, a motor-shaft carried on said vehicle,and extending between said disks, a driving frictionwheel slidablyengaged on said shaft, ad-justably-connected, pivotally-supported leversengaging said disks, a screw-shaft operatively engaged with one of saidlevers and held from longitudinal movement, means for operating saiscrew shaft, a yoke engaging said driving friction-wheel and meansadapted to operate said yoke and adjust said friction-wheel radially ofthe disks.

11. In adevice of the class described the combination with avehicle-axle, of a pair of inwardly facing, integrally connected disksslidably engaged thereon, an antifriction-bearing at the outer sides ofsaid disks, a lever pivotally engaged on each bearing, means adjustablyconnecting said levers, a drive-shaft projecting between said disks, afriction-wheel slidably engaged on said shaft between the disks, ascrew-shaft j ournaled above the driveshaft, a yoke movablelongitudinally thereof and adapted to adjust the friction-wheel radiallyof the disks, means for operating said screw-shaft and means foroperating said levers and adjusting the disks relative to saidfriction-wheel.

In testimony whereof I have hereunto subscribed my name in the presenceof two subscribing witnesses.

GEORGE W. MARBLE.

Witnesses:

VV. W. VVITHENBURY, H. S. RUDD.

